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Normal Bowel Patterns in Sedentary Patients

Introduction

One of the difficulties with abdominal plain film image interpretation is that a normal appearance of the bowel can show considerable variability. This can be attributed to congenital differences, variable amounts of bowel gas, surgical and other interventions and differences associated with activity levels of the patient. Elderly and disabled patients who are sedentary tend to show similar bowel patterns on plain film as discussed below.

Pattern Recognition

Patients who are sedentary will often show

•gas-filled bowel

•large bowel septa are thin, smooth and sharply marginated. (Stephen R. Baker, The Abdominal Plain Film, Appleton and Lange, 1990)

This is a supine abdominal plain film(left) of an elderly sedentary patient. Compare the appearance of the large bowel with that shown below. The sedentary patient's large bowel, particularly evident in the right colon, is sharply marginated and demonstrates very thin septa (white arrow). This is in contrast to the classic appearance of haustra and plicae semilunaris as shown below.
The referring doctor was concerned about the large amount of bowel gas and requested an erect abdominal view. The patient was unable to adopt the erect position and the radiographer performed a left decubitus view in lieu of the erect. The decubitus image (left) does not demonstrate air-fluid levels.

Comment

The distinctive appearance of the bowel in sedentary patients should not be confused with pathological appearances. It is not uncommon for this appearance to be mistaken for a motility disorder requiring additional imaging such as an erect abdominal image to check for fluid levels. Radiographers who are familiar with this pattern may be able to save an elderly frail patient from the discomfort associated with an erect or decubitus position when it is not required.

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M.J.Fuller	Latest page update: made by M.J.Fuller , Apr 12 2008, 4:52 AM EDT (about this update About This Update Edited by M.J.Fuller 16 words added 14 words deleted view changes - complete history)
	Keyword tags: abdominal plain film abdominal x-ray air-fluid levels decubitus disabled elderly frail marginated plicae semilunaris radiography sedentary septa More Info: links to this page Bookmark: Del.icio.us StumbleUpon Facebook

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Normal Bowel Patterns in Sedentary Patients

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	This is a supine abdominal plain film(left) of an elderly sedentary patient. Compare the appearance of the large bowel with that shown below. The sedentary patient's large bowel, particularly evident in the right colon, is sharply marginated and demonstrates very thin septa (white arrow). This is in contrast to the classic appearance of haustra and plicae semilunaris as shown below.
	The referring doctor was concerned about the large amount of bowel gas and requested an erect abdominal view. The patient was unable to adopt the erect position and the radiographer performed a left decubitus view in lieu of the erect. The decubitus image (left) does not demonstrate air-fluid levels.